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#1
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Oval Chain Ring: Recommendations?
Speaking as one with squaroid tendencies - who is going to get worse,
not better - I'm thinking about trying an oval ring. Seemed like I liked them back in my BioPace StumpJumper days. I'd think cruising speed would be mostly a wash, but low-RPM hills would be smoother - especially out of the saddle. Has anybody got something that they like and which they didn't pay an arm and a leg for? 104 x 35 -- Pete Cresswell |
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#2
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Oval Chain Ring: Recommendations?
On 5/14/2015 2:32 PM, (PeteCresswell) wrote:
Speaking as one with squaroid tendencies - who is going to get worse, not better - I'm thinking about trying an oval ring. Seemed like I liked them back in my BioPace StumpJumper days. I'd think cruising speed would be mostly a wash, but low-RPM hills would be smoother - especially out of the saddle. Has anybody got something that they like and which they didn't pay an arm and a leg for? 104 x 35 These are boutique items now and are not cheap. See http://www.ovalchainrings.com/contents/en-uk/p75_Ogival_chainrings_oval_chainrings_ovalchainrin gs_bernardhinault_road_tandwielen_48_34_tands.html I presume you have to hand shift between the front chain rings unless someone's invented a front derailleur that moves up and down as the cranks rotate. |
#3
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Oval Chain Ring: Recommendations?
On Thursday, May 14, 2015 at 6:06:38 PM UTC-4, sms wrote:
On 5/14/2015 2:32 PM, (PeteCresswell) wrote: Speaking as one with squaroid tendencies - who is going to get worse, not better - I'm thinking about trying an oval ring. Seemed like I liked them back in my BioPace StumpJumper days. I'd think cruising speed would be mostly a wash, but low-RPM hills would be smoother - especially out of the saddle. Has anybody got something that they like and which they didn't pay an arm and a leg for? 104 x 35 These are boutique items now and are not cheap. See http://www.ovalchainrings.com/contents/en-uk/p75_Ogival_chainrings_oval_chainrings_ovalchainrin gs_bernardhinault_road_tandwielen_48_34_tands.html I presume you have to hand shift between the front chain rings unless someone's invented a front derailleur that moves up and down as the cranks rotate. both CR's are matched ovoids together or gnaw...chain would wait for a match or the carrier would need a nubbin forcing the match transfer....cut an equalizing groove.... butbubtu if ovoids worked then ovoids would be everywhere and .....not if you search in google shopping there are a slew of ovoids on the market just not under the counter. |
#4
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Oval Chain Ring: Recommendations?
On Thursday, May 14, 2015 at 5:32:27 PM UTC-4, (PeteCresswell) wrote:
Speaking as one with squaroid tendencies - who is going to get worse, not better - I'm thinking about trying an oval ring. Seemed like I liked them back in my BioPace StumpJumper days. I'd think cruising speed would be mostly a wash, but low-RPM hills would be smoother - especially out of the saddle. Has anybody got something that they like and which they didn't pay an arm and a leg for? 104 x 35 -- Pete Cresswell IIRC Sheldon on his site stated that you can spin even with Bio-pace chainrings. Note that there were 2 types of Bio-pace. I like them. Triple with 25-38-48 or a double with 42-52 (or smaller if you can get them0 or a triply with the inner ring left off if you want a double with smaller than 39 teeth. I think 39 teeth was the smalles ring that'd fit a double. Cheers |
#5
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Oval Chain Ring: Recommendations?
On Thu, 14 May 2015 15:06:36 -0700, sms
wrote: I presume you have to hand shift between the front chain rings unless someone's invented a front derailleur that moves up and down as the cranks rotate. Some of the Biopace rings were not so radical that they wouldn't work with a conventional derailleur. For example, this machine (that I stupidly gave away) uses a conventional front derailleur: http://802.11junk.com/jeffl/pics/bicycles/slides/Specialized-StumpJumper.html Was never able to ride it, even with home made stilts on my shoes. -- Jeff Liebermann 150 Felker St #D http://www.LearnByDestroying.com Santa Cruz CA 95060 http://802.11junk.com Skype: JeffLiebermann AE6KS 831-336-2558 |
#6
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Oval Chain Ring: Recommendations?
Per sms:
I presume you have to hand shift between the front chain rings unless someone's invented a front derailleur that moves up and down as the cranks rotate. Hub shifter, only one front ring. But my old StumpJumper had a front der that handled the BioPace rings with not problems. -- Pete Cresswell |
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